Belfast, UK to Las Vegas is an approximately 15-hour flight. You can also do a combination of bus and flight. Due to the time zone difference, you'll gain 8 hours traveling from Belfast to Las Vegas. When traveling from Belfast in April, plan for much hotter days and a bit warmer nights in Las Vegas: temperatures range from 31°C by day to 16°C at night. Finish your sightseeing early on the 11th (Thu) so you can drive to Yosemite National Park.

You can drive from Las Vegas to Yosemite National Park in 9 hours. Traveling from Las Vegas in April, expect Yosemite National Park to be much colder, temps between 17°C and -2°C. Finish your sightseeing early on the 15th (Mon) so you can drive to San Francisco.

Traveling by car from Yosemite National Park to San Francisco takes 4 hours. Alternatively, you can take a bus; or do a combination of taxi, bus, flight, and subway. Traveling from Yosemite National Park in April, you will find days in San Francisco are somewhat warmer (22°C), and nights are much hotter (12°C). Finish up your sightseeing early on the 18th (Thu) so you can travel back home.